Table 1.

Pregnancy and barren rates after a 9 week mating period during the summer of 2012

Group	Pregnant	Barren
A	30/32 (94%)	2/32 (6%)
B	29/33 (88%)	4/33 (12%)
C	12/31 (39%)	19/31 (61%)
D	16/18 (89%)	2/18 (11%)
E	23/32 (72%)	9/32 (28%)
F	22/23 (96%)	1/23 (4%)
Total	132/169 (78%)	37/169 (22%)

Low pregnancy and high barren rates for group C, group E and total prompting further investigation in bold.